Plumber Red Seal · Question
Minimum trap seal depth (typical):
Code-specified range; commonly 50 mm.
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Question: Minimum trap seal depth (typical):
Answer options: ✅ 38–100 mm (1.5–4 in)
- 10 mm
- 200 mm
- 500 mm
Correct answer: 38–100 mm (1.5–4 in)
Explanation: Code-specified range; commonly 50 mm.
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